mirror of
https://github.com/microsoft/playwright.git
synced 2025-06-26 21:40:17 +00:00
581 lines
21 KiB
JavaScript
581 lines
21 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
"use strict";
|
|
// Note: this file should be loadabale with eval() into worker environment.
|
|
// Avoid Components.*, ChromeUtils and global const variables.
|
|
|
|
if (!this.Debugger) {
|
|
// Worker has a Debugger defined already.
|
|
const {addDebuggerToGlobal} = ChromeUtils.import("resource://gre/modules/jsdebugger.jsm", {});
|
|
addDebuggerToGlobal(Components.utils.getGlobalForObject(this));
|
|
}
|
|
|
|
let lastId = 0;
|
|
function generateId() {
|
|
return 'id-' + (++lastId);
|
|
}
|
|
|
|
const consoleLevelToProtocolType = {
|
|
'dir': 'dir',
|
|
'log': 'log',
|
|
'debug': 'debug',
|
|
'info': 'info',
|
|
'error': 'error',
|
|
'warn': 'warning',
|
|
'dirxml': 'dirxml',
|
|
'table': 'table',
|
|
'trace': 'trace',
|
|
'clear': 'clear',
|
|
'group': 'startGroup',
|
|
'groupCollapsed': 'startGroupCollapsed',
|
|
'groupEnd': 'endGroup',
|
|
'assert': 'assert',
|
|
'profile': 'profile',
|
|
'profileEnd': 'profileEnd',
|
|
'count': 'count',
|
|
'countReset': 'countReset',
|
|
'time': null,
|
|
'timeLog': 'timeLog',
|
|
'timeEnd': 'timeEnd',
|
|
'timeStamp': 'timeStamp',
|
|
};
|
|
|
|
const disallowedMessageCategories = new Set([
|
|
'XPConnect JavaScript',
|
|
'component javascript',
|
|
'chrome javascript',
|
|
'chrome registration',
|
|
'XBL',
|
|
'XBL Prototype Handler',
|
|
'XBL Content Sink',
|
|
'xbl javascript',
|
|
]);
|
|
|
|
class Runtime {
|
|
constructor(isWorker = false) {
|
|
this._debugger = new Debugger();
|
|
this._pendingPromises = new Map();
|
|
this._executionContexts = new Map();
|
|
this._windowToExecutionContext = new Map();
|
|
this._eventListeners = [];
|
|
if (isWorker) {
|
|
this._registerWorkerConsoleHandler();
|
|
} else {
|
|
const {Services} = ChromeUtils.import("resource://gre/modules/Services.jsm");
|
|
this._registerConsoleServiceListener(Services);
|
|
this._registerConsoleObserver(Services);
|
|
}
|
|
// We can't use event listener here to be compatible with Worker Global Context.
|
|
// Use plain callbacks instead.
|
|
this.events = {
|
|
onConsoleMessage: createEvent(),
|
|
onErrorFromWorker: createEvent(),
|
|
onExecutionContextCreated: createEvent(),
|
|
onExecutionContextDestroyed: createEvent(),
|
|
onBindingCalled: createEvent(),
|
|
};
|
|
}
|
|
|
|
executionContexts() {
|
|
return [...this._executionContexts.values()];
|
|
}
|
|
|
|
async evaluate({executionContextId, expression, returnByValue}) {
|
|
const executionContext = this.findExecutionContext(executionContextId);
|
|
if (!executionContext)
|
|
throw new Error('Failed to find execution context with id = ' + executionContextId);
|
|
const exceptionDetails = {};
|
|
let result = await executionContext.evaluateScript(expression, exceptionDetails);
|
|
if (!result)
|
|
return {exceptionDetails};
|
|
if (returnByValue)
|
|
result = executionContext.ensureSerializedToValue(result);
|
|
return {result};
|
|
}
|
|
|
|
async callFunction({executionContextId, functionDeclaration, args, returnByValue}) {
|
|
const executionContext = this.findExecutionContext(executionContextId);
|
|
if (!executionContext)
|
|
throw new Error('Failed to find execution context with id = ' + executionContextId);
|
|
const exceptionDetails = {};
|
|
let result = await executionContext.evaluateFunction(functionDeclaration, args, exceptionDetails);
|
|
if (!result)
|
|
return {exceptionDetails};
|
|
if (returnByValue)
|
|
result = executionContext.ensureSerializedToValue(result);
|
|
return {result};
|
|
}
|
|
|
|
async getObjectProperties({executionContextId, objectId}) {
|
|
const executionContext = this.findExecutionContext(executionContextId);
|
|
if (!executionContext)
|
|
throw new Error('Failed to find execution context with id = ' + executionContextId);
|
|
return {properties: executionContext.getObjectProperties(objectId)};
|
|
}
|
|
|
|
async disposeObject({executionContextId, objectId}) {
|
|
const executionContext = this.findExecutionContext(executionContextId);
|
|
if (!executionContext)
|
|
throw new Error('Failed to find execution context with id = ' + executionContextId);
|
|
return executionContext.disposeObject(objectId);
|
|
}
|
|
|
|
_registerConsoleServiceListener(Services) {
|
|
const Ci = Components.interfaces;
|
|
const consoleServiceListener = {
|
|
QueryInterface: ChromeUtils.generateQI([Ci.nsIConsoleListener]),
|
|
|
|
observe: message => {
|
|
if (!(message instanceof Ci.nsIScriptError) || !message.outerWindowID ||
|
|
!message.category || disallowedMessageCategories.has(message.category)) {
|
|
return;
|
|
}
|
|
const errorWindow = Services.wm.getOuterWindowWithId(message.outerWindowID);
|
|
if (message.category === 'Web Worker' && message.logLevel === Ci.nsIConsoleMessage.error) {
|
|
emitEvent(this.events.onErrorFromWorker, errorWindow, message.message, '' + message.stack);
|
|
return;
|
|
}
|
|
const executionContext = this._windowToExecutionContext.get(errorWindow);
|
|
if (!executionContext)
|
|
return;
|
|
const typeNames = {
|
|
[Ci.nsIConsoleMessage.debug]: 'debug',
|
|
[Ci.nsIConsoleMessage.info]: 'info',
|
|
[Ci.nsIConsoleMessage.warn]: 'warn',
|
|
[Ci.nsIConsoleMessage.error]: 'error',
|
|
};
|
|
emitEvent(this.events.onConsoleMessage, {
|
|
args: [{
|
|
value: message.message,
|
|
}],
|
|
type: typeNames[message.logLevel],
|
|
executionContextId: executionContext.id(),
|
|
location: {
|
|
lineNumber: message.lineNumber,
|
|
columnNumber: message.columnNumber,
|
|
url: message.sourceName,
|
|
},
|
|
});
|
|
},
|
|
};
|
|
Services.console.registerListener(consoleServiceListener);
|
|
this._eventListeners.push(() => Services.console.unregisterListener(consoleServiceListener));
|
|
}
|
|
|
|
_registerConsoleObserver(Services) {
|
|
const consoleObserver = ({wrappedJSObject}, topic, data) => {
|
|
const executionContext = Array.from(this._executionContexts.values()).find(context => {
|
|
// There is no easy way to determine isolated world context and we normally don't write
|
|
// objects to console from utility worlds so we always return main world context here.
|
|
if (context._isIsolatedWorldContext())
|
|
return false;
|
|
const domWindow = context._domWindow;
|
|
return domWindow && domWindow.windowGlobalChild.innerWindowId === wrappedJSObject.innerID;
|
|
});
|
|
if (!executionContext)
|
|
return;
|
|
this._onConsoleMessage(executionContext, wrappedJSObject);
|
|
};
|
|
Services.obs.addObserver(consoleObserver, "console-api-log-event");
|
|
this._eventListeners.push(() => Services.obs.removeObserver(consoleObserver, "console-api-log-event"));
|
|
}
|
|
|
|
_registerWorkerConsoleHandler() {
|
|
setConsoleEventHandler(message => {
|
|
const executionContext = Array.from(this._executionContexts.values())[0];
|
|
this._onConsoleMessage(executionContext, message);
|
|
});
|
|
this._eventListeners.push(() => setConsoleEventHandler(null));
|
|
}
|
|
|
|
_onConsoleMessage(executionContext, message) {
|
|
const type = consoleLevelToProtocolType[message.level];
|
|
if (!type)
|
|
return;
|
|
const args = message.arguments.map(arg => executionContext.rawValueToRemoteObject(arg));
|
|
emitEvent(this.events.onConsoleMessage, {
|
|
args,
|
|
type,
|
|
executionContextId: executionContext.id(),
|
|
location: {
|
|
lineNumber: message.lineNumber - 1,
|
|
columnNumber: message.columnNumber - 1,
|
|
url: message.filename,
|
|
},
|
|
});
|
|
}
|
|
|
|
dispose() {
|
|
for (const tearDown of this._eventListeners)
|
|
tearDown.call(null);
|
|
this._eventListeners = [];
|
|
}
|
|
|
|
async _awaitPromise(executionContext, obj, exceptionDetails = {}) {
|
|
if (obj.promiseState === 'fulfilled')
|
|
return {success: true, obj: obj.promiseValue};
|
|
if (obj.promiseState === 'rejected') {
|
|
const debuggee = executionContext._debuggee;
|
|
exceptionDetails.text = debuggee.executeInGlobalWithBindings('e.message', {e: obj.promiseReason}).return;
|
|
exceptionDetails.stack = debuggee.executeInGlobalWithBindings('e.stack', {e: obj.promiseReason}).return;
|
|
return {success: false, obj: null};
|
|
}
|
|
let resolve, reject;
|
|
const promise = new Promise((a, b) => {
|
|
resolve = a;
|
|
reject = b;
|
|
});
|
|
this._pendingPromises.set(obj.promiseID, {resolve, reject, executionContext, exceptionDetails});
|
|
if (this._pendingPromises.size === 1)
|
|
this._debugger.onPromiseSettled = this._onPromiseSettled.bind(this);
|
|
return await promise;
|
|
}
|
|
|
|
_onPromiseSettled(obj) {
|
|
const pendingPromise = this._pendingPromises.get(obj.promiseID);
|
|
if (!pendingPromise)
|
|
return;
|
|
this._pendingPromises.delete(obj.promiseID);
|
|
if (!this._pendingPromises.size)
|
|
this._debugger.onPromiseSettled = undefined;
|
|
|
|
if (obj.promiseState === 'fulfilled') {
|
|
pendingPromise.resolve({success: true, obj: obj.promiseValue});
|
|
return;
|
|
};
|
|
const debuggee = pendingPromise.executionContext._debuggee;
|
|
pendingPromise.exceptionDetails.text = debuggee.executeInGlobalWithBindings('e.message', {e: obj.promiseReason}).return;
|
|
pendingPromise.exceptionDetails.stack = debuggee.executeInGlobalWithBindings('e.stack', {e: obj.promiseReason}).return;
|
|
pendingPromise.resolve({success: false, obj: null});
|
|
}
|
|
|
|
createExecutionContext(domWindow, contextGlobal, auxData) {
|
|
// Note: domWindow is null for workers.
|
|
const context = new ExecutionContext(this, domWindow, contextGlobal, auxData);
|
|
this._executionContexts.set(context._id, context);
|
|
if (domWindow)
|
|
this._windowToExecutionContext.set(domWindow, context);
|
|
emitEvent(this.events.onExecutionContextCreated, context);
|
|
return context;
|
|
}
|
|
|
|
findExecutionContext(executionContextId) {
|
|
const executionContext = this._executionContexts.get(executionContextId);
|
|
if (!executionContext)
|
|
throw new Error('Failed to find execution context with id = ' + executionContextId);
|
|
return executionContext;
|
|
}
|
|
|
|
destroyExecutionContext(destroyedContext) {
|
|
for (const [promiseID, {reject, executionContext}] of this._pendingPromises) {
|
|
if (executionContext === destroyedContext) {
|
|
reject(new Error('Execution context was destroyed!'));
|
|
this._pendingPromises.delete(promiseID);
|
|
}
|
|
}
|
|
if (!this._pendingPromises.size)
|
|
this._debugger.onPromiseSettled = undefined;
|
|
this._debugger.removeDebuggee(destroyedContext._contextGlobal);
|
|
this._executionContexts.delete(destroyedContext._id);
|
|
if (destroyedContext._domWindow)
|
|
this._windowToExecutionContext.delete(destroyedContext._domWindow);
|
|
emitEvent(this.events.onExecutionContextDestroyed, destroyedContext);
|
|
}
|
|
}
|
|
|
|
class ExecutionContext {
|
|
constructor(runtime, domWindow, contextGlobal, auxData) {
|
|
this._runtime = runtime;
|
|
this._domWindow = domWindow;
|
|
this._contextGlobal = contextGlobal;
|
|
this._debuggee = runtime._debugger.addDebuggee(contextGlobal);
|
|
this._remoteObjects = new Map();
|
|
this._id = generateId();
|
|
this._auxData = auxData;
|
|
this._jsonStringifyObject = this._debuggee.executeInGlobal(`((stringify, object) => {
|
|
const oldToJSON = Date.prototype.toJSON;
|
|
Date.prototype.toJSON = undefined;
|
|
const oldArrayToJSON = Array.prototype.toJSON;
|
|
const oldArrayHadToJSON = Array.prototype.hasOwnProperty('toJSON');
|
|
if (oldArrayHadToJSON)
|
|
Array.prototype.toJSON = undefined;
|
|
|
|
let hasSymbol = false;
|
|
const result = stringify(object, (key, value) => {
|
|
if (typeof value === 'symbol')
|
|
hasSymbol = true;
|
|
return value;
|
|
});
|
|
|
|
Date.prototype.toJSON = oldToJSON;
|
|
if (oldArrayHadToJSON)
|
|
Array.prototype.toJSON = oldArrayToJSON;
|
|
|
|
return hasSymbol ? undefined : result;
|
|
}).bind(null, JSON.stringify.bind(JSON))`).return;
|
|
}
|
|
|
|
id() {
|
|
return this._id;
|
|
}
|
|
|
|
auxData() {
|
|
return this._auxData;
|
|
}
|
|
|
|
_isIsolatedWorldContext() {
|
|
return !!this._auxData.name;
|
|
}
|
|
|
|
async evaluateScript(script, exceptionDetails = {}) {
|
|
const userInputHelper = this._domWindow ? this._domWindow.windowUtils.setHandlingUserInput(true) : null;
|
|
if (this._domWindow && this._domWindow.document)
|
|
this._domWindow.document.notifyUserGestureActivation();
|
|
|
|
let {success, obj} = this._getResult(this._debuggee.executeInGlobal(script), exceptionDetails);
|
|
userInputHelper && userInputHelper.destruct();
|
|
if (!success)
|
|
return null;
|
|
if (obj && obj.isPromise) {
|
|
const awaitResult = await this._runtime._awaitPromise(this, obj, exceptionDetails);
|
|
if (!awaitResult.success)
|
|
return null;
|
|
obj = awaitResult.obj;
|
|
}
|
|
return this._createRemoteObject(obj);
|
|
}
|
|
|
|
evaluateScriptSafely(script) {
|
|
try {
|
|
this._debuggee.executeInGlobal(script);
|
|
} catch (e) {
|
|
dump(`ERROR: ${e.message}\n${e.stack}\n`);
|
|
}
|
|
}
|
|
|
|
async evaluateFunction(functionText, args, exceptionDetails = {}) {
|
|
const funEvaluation = this._getResult(this._debuggee.executeInGlobal('(' + functionText + ')'), exceptionDetails);
|
|
if (!funEvaluation.success)
|
|
return null;
|
|
if (!funEvaluation.obj.callable)
|
|
throw new Error('functionText does not evaluate to a function!');
|
|
args = args.map(arg => {
|
|
if (arg.objectId) {
|
|
if (!this._remoteObjects.has(arg.objectId))
|
|
throw new Error('Cannot find object with id = ' + arg.objectId);
|
|
return this._remoteObjects.get(arg.objectId);
|
|
}
|
|
switch (arg.unserializableValue) {
|
|
case 'Infinity': return Infinity;
|
|
case '-Infinity': return -Infinity;
|
|
case '-0': return -0;
|
|
case 'NaN': return NaN;
|
|
default: return this._toDebugger(arg.value);
|
|
}
|
|
});
|
|
const userInputHelper = this._domWindow ? this._domWindow.windowUtils.setHandlingUserInput(true) : null;
|
|
if (this._domWindow && this._domWindow.document)
|
|
this._domWindow.document.notifyUserGestureActivation();
|
|
let {success, obj} = this._getResult(funEvaluation.obj.apply(null, args), exceptionDetails);
|
|
userInputHelper && userInputHelper.destruct();
|
|
if (!success)
|
|
return null;
|
|
if (obj && obj.isPromise) {
|
|
const awaitResult = await this._runtime._awaitPromise(this, obj, exceptionDetails);
|
|
if (!awaitResult.success)
|
|
return null;
|
|
obj = awaitResult.obj;
|
|
}
|
|
return this._createRemoteObject(obj);
|
|
}
|
|
|
|
addBinding(name, script) {
|
|
Cu.exportFunction((...args) => {
|
|
emitEvent(this._runtime.events.onBindingCalled, {
|
|
executionContextId: this._id,
|
|
name,
|
|
payload: args[0],
|
|
});
|
|
}, this._contextGlobal, {
|
|
defineAs: name,
|
|
});
|
|
this.evaluateScriptSafely(script);
|
|
}
|
|
|
|
unsafeObject(objectId) {
|
|
if (!this._remoteObjects.has(objectId))
|
|
return;
|
|
return { object: this._remoteObjects.get(objectId).unsafeDereference() };
|
|
}
|
|
|
|
rawValueToRemoteObject(rawValue) {
|
|
const debuggerObj = this._debuggee.makeDebuggeeValue(rawValue);
|
|
return this._createRemoteObject(debuggerObj);
|
|
}
|
|
|
|
_instanceOf(debuggerObj, rawObj, className) {
|
|
if (this._domWindow)
|
|
return rawObj instanceof this._domWindow[className];
|
|
return this._debuggee.executeInGlobalWithBindings('o instanceof this[className]', {o: debuggerObj, className: this._debuggee.makeDebuggeeValue(className)}).return;
|
|
}
|
|
|
|
_createRemoteObject(debuggerObj) {
|
|
if (debuggerObj instanceof Debugger.Object) {
|
|
const objectId = generateId();
|
|
this._remoteObjects.set(objectId, debuggerObj);
|
|
const rawObj = debuggerObj.unsafeDereference();
|
|
const type = typeof rawObj;
|
|
let subtype = undefined;
|
|
if (debuggerObj.isProxy)
|
|
subtype = 'proxy';
|
|
else if (Array.isArray(rawObj))
|
|
subtype = 'array';
|
|
else if (Object.is(rawObj, null))
|
|
subtype = 'null';
|
|
else if (this._instanceOf(debuggerObj, rawObj, 'Node'))
|
|
subtype = 'node';
|
|
else if (this._instanceOf(debuggerObj, rawObj, 'RegExp'))
|
|
subtype = 'regexp';
|
|
else if (this._instanceOf(debuggerObj, rawObj, 'Date'))
|
|
subtype = 'date';
|
|
else if (this._instanceOf(debuggerObj, rawObj, 'Map'))
|
|
subtype = 'map';
|
|
else if (this._instanceOf(debuggerObj, rawObj, 'Set'))
|
|
subtype = 'set';
|
|
else if (this._instanceOf(debuggerObj, rawObj, 'WeakMap'))
|
|
subtype = 'weakmap';
|
|
else if (this._instanceOf(debuggerObj, rawObj, 'WeakSet'))
|
|
subtype = 'weakset';
|
|
else if (this._instanceOf(debuggerObj, rawObj, 'Error'))
|
|
subtype = 'error';
|
|
else if (this._instanceOf(debuggerObj, rawObj, 'Promise'))
|
|
subtype = 'promise';
|
|
else if ((this._instanceOf(debuggerObj, rawObj, 'Int8Array')) || (this._instanceOf(debuggerObj, rawObj, 'Uint8Array')) ||
|
|
(this._instanceOf(debuggerObj, rawObj, 'Uint8ClampedArray')) || (this._instanceOf(debuggerObj, rawObj, 'Int16Array')) ||
|
|
(this._instanceOf(debuggerObj, rawObj, 'Uint16Array')) || (this._instanceOf(debuggerObj, rawObj, 'Int32Array')) ||
|
|
(this._instanceOf(debuggerObj, rawObj, 'Uint32Array')) || (this._instanceOf(debuggerObj, rawObj, 'Float32Array')) ||
|
|
(this._instanceOf(debuggerObj, rawObj, 'Float64Array'))) {
|
|
subtype = 'typedarray';
|
|
}
|
|
return {objectId, type, subtype};
|
|
}
|
|
if (typeof debuggerObj === 'symbol') {
|
|
const objectId = generateId();
|
|
this._remoteObjects.set(objectId, debuggerObj);
|
|
return {objectId, type: 'symbol'};
|
|
}
|
|
|
|
let unserializableValue = undefined;
|
|
if (Object.is(debuggerObj, NaN))
|
|
unserializableValue = 'NaN';
|
|
else if (Object.is(debuggerObj, -0))
|
|
unserializableValue = '-0';
|
|
else if (Object.is(debuggerObj, Infinity))
|
|
unserializableValue = 'Infinity';
|
|
else if (Object.is(debuggerObj, -Infinity))
|
|
unserializableValue = '-Infinity';
|
|
return unserializableValue ? {unserializableValue} : {value: debuggerObj};
|
|
}
|
|
|
|
ensureSerializedToValue(protocolObject) {
|
|
if (!protocolObject.objectId)
|
|
return protocolObject;
|
|
const obj = this._remoteObjects.get(protocolObject.objectId);
|
|
this._remoteObjects.delete(protocolObject.objectId);
|
|
return {value: this._serialize(obj)};
|
|
}
|
|
|
|
_toDebugger(obj) {
|
|
if (typeof obj !== 'object')
|
|
return obj;
|
|
if (obj === null)
|
|
return obj;
|
|
const properties = {};
|
|
for (let [key, value] of Object.entries(obj)) {
|
|
properties[key] = {
|
|
configurable: true,
|
|
writable: true,
|
|
enumerable: true,
|
|
value: this._toDebugger(value),
|
|
};
|
|
}
|
|
const baseObject = Array.isArray(obj) ? '([])' : '({})';
|
|
const debuggerObj = this._debuggee.executeInGlobal(baseObject).return;
|
|
debuggerObj.defineProperties(properties);
|
|
return debuggerObj;
|
|
}
|
|
|
|
_serialize(obj) {
|
|
const result = this._debuggee.executeInGlobalWithBindings('stringify(e)', {e: obj, stringify: this._jsonStringifyObject});
|
|
if (result.throw)
|
|
throw new Error('Object is not serializable');
|
|
return result.return === undefined ? undefined : JSON.parse(result.return);
|
|
}
|
|
|
|
disposeObject(objectId) {
|
|
this._remoteObjects.delete(objectId);
|
|
}
|
|
|
|
getObjectProperties(objectId) {
|
|
if (!this._remoteObjects.has(objectId))
|
|
throw new Error('Cannot find object with id = ' + arg.objectId);
|
|
const result = [];
|
|
for (let obj = this._remoteObjects.get(objectId); obj; obj = obj.proto) {
|
|
for (const propertyName of obj.getOwnPropertyNames()) {
|
|
const descriptor = obj.getOwnPropertyDescriptor(propertyName);
|
|
if (!descriptor.enumerable)
|
|
continue;
|
|
result.push({
|
|
name: propertyName,
|
|
value: this._createRemoteObject(descriptor.value),
|
|
});
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
_getResult(completionValue, exceptionDetails = {}) {
|
|
if (!completionValue) {
|
|
exceptionDetails.text = 'Evaluation terminated!';
|
|
exceptionDetails.stack = '';
|
|
return {success: false, obj: null};
|
|
}
|
|
if (completionValue.throw) {
|
|
if (this._debuggee.executeInGlobalWithBindings('e instanceof Error', {e: completionValue.throw}).return) {
|
|
exceptionDetails.text = this._debuggee.executeInGlobalWithBindings('e.message', {e: completionValue.throw}).return;
|
|
exceptionDetails.stack = this._debuggee.executeInGlobalWithBindings('e.stack', {e: completionValue.throw}).return;
|
|
} else {
|
|
exceptionDetails.value = this._serialize(completionValue.throw);
|
|
}
|
|
return {success: false, obj: null};
|
|
}
|
|
return {success: true, obj: completionValue.return};
|
|
}
|
|
}
|
|
|
|
const listenersSymbol = Symbol('listeners');
|
|
|
|
function createEvent() {
|
|
const listeners = new Set();
|
|
const subscribeFunction = listener => {
|
|
listeners.add(listener);
|
|
return () => listeners.delete(listener);
|
|
}
|
|
subscribeFunction[listenersSymbol] = listeners;
|
|
return subscribeFunction;
|
|
}
|
|
|
|
function emitEvent(event, ...args) {
|
|
let listeners = event[listenersSymbol];
|
|
if (!listeners || !listeners.size)
|
|
return;
|
|
listeners = new Set(listeners);
|
|
for (const listener of listeners)
|
|
listener.call(null, ...args);
|
|
}
|
|
|
|
var EXPORTED_SYMBOLS = ['Runtime'];
|
|
this.Runtime = Runtime;
|